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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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470 __ push(descriptor->register_params_[i]); | 470 __ push(descriptor->register_params_[i]); |
471 } | 471 } |
472 ExternalReference miss = descriptor->miss_handler(); | 472 ExternalReference miss = descriptor->miss_handler(); |
473 __ CallExternalReference(miss, descriptor->register_param_count_); | 473 __ CallExternalReference(miss, descriptor->register_param_count_); |
474 } | 474 } |
475 | 475 |
476 __ Ret(); | 476 __ Ret(); |
477 } | 477 } |
478 | 478 |
479 | 479 |
480 void FastNewBlockContextStub::Generate(MacroAssembler* masm) { | |
481 // Stack layout on entry: | |
482 // | |
483 // [sp]: function. | |
484 // [sp + kPointerSize]: serialized scope info | |
485 | |
486 // Try to allocate the context in new space. | |
487 Label gc; | |
488 int length = slots_ + Context::MIN_CONTEXT_SLOTS; | |
489 __ Allocate(FixedArray::SizeFor(length), v0, a1, a2, &gc, TAG_OBJECT); | |
490 | |
491 // Load the function from the stack. | |
492 __ lw(a3, MemOperand(sp, 0)); | |
493 | |
494 // Load the serialized scope info from the stack. | |
495 __ lw(a1, MemOperand(sp, 1 * kPointerSize)); | |
496 | |
497 // Set up the object header. | |
498 __ LoadRoot(a2, Heap::kBlockContextMapRootIndex); | |
499 __ sw(a2, FieldMemOperand(v0, HeapObject::kMapOffset)); | |
500 __ li(a2, Operand(Smi::FromInt(length))); | |
501 __ sw(a2, FieldMemOperand(v0, FixedArray::kLengthOffset)); | |
502 | |
503 // If this block context is nested in the native context we get a smi | |
504 // sentinel instead of a function. The block context should get the | |
505 // canonical empty function of the native context as its closure which | |
506 // we still have to look up. | |
507 Label after_sentinel; | |
508 __ JumpIfNotSmi(a3, &after_sentinel); | |
509 if (FLAG_debug_code) { | |
510 __ Assert(eq, kExpected0AsASmiSentinel, a3, Operand(zero_reg)); | |
511 } | |
512 __ lw(a3, GlobalObjectOperand()); | |
513 __ lw(a3, FieldMemOperand(a3, GlobalObject::kNativeContextOffset)); | |
514 __ lw(a3, ContextOperand(a3, Context::CLOSURE_INDEX)); | |
515 __ bind(&after_sentinel); | |
516 | |
517 // Set up the fixed slots, copy the global object from the previous context. | |
518 __ lw(a2, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); | |
519 __ sw(a3, ContextOperand(v0, Context::CLOSURE_INDEX)); | |
520 __ sw(cp, ContextOperand(v0, Context::PREVIOUS_INDEX)); | |
521 __ sw(a1, ContextOperand(v0, Context::EXTENSION_INDEX)); | |
522 __ sw(a2, ContextOperand(v0, Context::GLOBAL_OBJECT_INDEX)); | |
523 | |
524 // Initialize the rest of the slots to the hole value. | |
525 __ LoadRoot(a1, Heap::kTheHoleValueRootIndex); | |
526 for (int i = 0; i < slots_; i++) { | |
527 __ sw(a1, ContextOperand(v0, i + Context::MIN_CONTEXT_SLOTS)); | |
528 } | |
529 | |
530 // Remove the on-stack argument and return. | |
531 __ mov(cp, v0); | |
532 __ DropAndRet(2); | |
533 | |
534 // Need to collect. Call into runtime system. | |
535 __ bind(&gc); | |
536 __ TailCallRuntime(Runtime::kPushBlockContext, 2, 1); | |
537 } | |
538 | |
539 | |
540 // Takes a Smi and converts to an IEEE 64 bit floating point value in two | 480 // Takes a Smi and converts to an IEEE 64 bit floating point value in two |
541 // registers. The format is 1 sign bit, 11 exponent bits (biased 1023) and | 481 // registers. The format is 1 sign bit, 11 exponent bits (biased 1023) and |
542 // 52 fraction bits (20 in the first word, 32 in the second). Zeros is a | 482 // 52 fraction bits (20 in the first word, 32 in the second). Zeros is a |
543 // scratch register. Destroys the source register. No GC occurs during this | 483 // scratch register. Destroys the source register. No GC occurs during this |
544 // stub so you don't have to set up the frame. | 484 // stub so you don't have to set up the frame. |
545 class ConvertToDoubleStub : public PlatformCodeStub { | 485 class ConvertToDoubleStub : public PlatformCodeStub { |
546 public: | 486 public: |
547 ConvertToDoubleStub(Register result_reg_1, | 487 ConvertToDoubleStub(Register result_reg_1, |
548 Register result_reg_2, | 488 Register result_reg_2, |
549 Register source_reg, | 489 Register source_reg, |
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5793 restore_context ? | 5733 restore_context ? |
5794 &context_restore_operand : NULL); | 5734 &context_restore_operand : NULL); |
5795 } | 5735 } |
5796 | 5736 |
5797 | 5737 |
5798 #undef __ | 5738 #undef __ |
5799 | 5739 |
5800 } } // namespace v8::internal | 5740 } } // namespace v8::internal |
5801 | 5741 |
5802 #endif // V8_TARGET_ARCH_MIPS | 5742 #endif // V8_TARGET_ARCH_MIPS |
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